Designing an incoherent optical detection sensor (LiDAR) utilizing a range-compensating lens

Applied Optics
Jason Mudge

Abstract

There are many trades to be made when designing an optical system. In this work, an incoherent optical detection sensor (often referred to as an energy- or direct-detection sensor, or a time-of-flight LiDAR) is designed at the sensor or top level using newly developed tools [Appl. Opt.59, 1939 (2020)APOPAI0003-693510.1364/AO.384135]. While incoherent detection sensors, relative to coherent frequency or phase-modulated sensors, are not as useful in cluttered environments, they have their place due to their simplicity and high performance in uncluttered or lightly cluttered environments. In this particular design, a nontraditional receive lens is utilized that has the unique ability to adjust the amount of return signal placed on the detector based on target range, i.e., a range-compensating lens (RCL) [Appl. Opt.58, 7921 (2019)APOPAI0003-693510.1364/AO.58.007921]. Only a two-element RCL is utilized in this work, but it proves the ability to shape the return signal gauging the changes in the stochastic performance, paving the way to a multi-element RCL for additional design freedom in shaping.

References

Feb 12, 2008·Applied Optics·J C LeachtenauerN Salvaggio
May 14, 2020·Applied Optics·Jason Mudge

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